Canon PIXMA MG2440 - Manual (Page 285)

Before
Displays the image before correction.
After
Displays the image after correction.
(Whole Image View)
Fits the preview to the area size.
(Reduce/Enlarge)
Click (Reduce) or (Enlarge) to reduce or enlarge the display size. You can also
freely change the display size by dragging the slider.
Note
Refer to " Correcting Still Images Captured from Videos " for how to correct still images
captured from a video.
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